They either run low impedance speakers or run two pairs of 8 ohm speakers. If you are worried about the power, i would not be too concerned. While you pick up twice the current at half the impedance, your voltage is what makes the biggest difference in terms of "cleanliness" and that doesn't doesn't change when shifting impedances. The drawback to lowering the impedance of the speaker load is that you cut your damping factor in half, which can result in the amplifier having less control over the speakers and / or allowing the speakers to more easily influence the overall performance of the amp. Stick with what you have and optimize your system for the amp that you just bought. It should work fine so long as you don't want rock concert levels in your listening room. Sean
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